Monster Enslavement and Control Undead; give latter to anubis guards.

Monsters will only attempt to enslave your allies; Control Undead works
against anything undead in LOS (and breaks charms you've placed undead,
so they can re-Control your own controlled undead).

Yes, friendlies can use these spells; those doing so charm enemies (or
remove hexes).
A primitive implementation of monster Inner Flame.

Leverages the new "hex an ally of the target" logic for enslavement;
also targets the ally immediately afterwards for maximum explosive
factor.